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Intestinally derived lipoprotein particles in non-insulin-dependent diabetic patients with and without hypertriglyceridaemia

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Abstract

We have previously demonstrated alterations in apolipoprotein B-48 metabolism in the post-prandial state in patients with non-insulin-dependent diabetes mellitus. This study investigates the relationship between hypertriglyceridaemia and post-prandial lipoprotein metabolism. Four groups of patients were examined: non-insulin-dependent diabetic patients, with normal serum triglyceride levels (serum triglyceride <2.1 mmol l−1; haemoglobin HbA1c 5.5%±0.4%); poorly controlled, non-insulin-dependent diabetic patients with hypertriglyceridaemia (serum triglyceride >2.1 mmol 1−1; HbA1c 8.8%±0.9%); nondiabetic subjects with serum triglycerides <2.1 mmoll−1; and non-diabetic subjects with hypertriglyceridaemia (serum triglyceride>2.1 mmol l−1). Subjects were studied fasting and following a high-fat meal (1300 kcal). The triglyceride-rich lipoprotein fraction was isolated by ultracentrifugation (d<1.006 g ml−1). Apoprotein B-48, apoprotein B-100 and apoprotein E were separated on 4%–15% gradient gels and quantified as a percentage of the fasting concentration by densitometric scanning. Triglyceride-rich lipoprotein apolipoprotein B-48 and apolipoprotein B-100 post-prandial profiles demonstrated a maximum increase either at 2 h or rising still further to a peak at 6 h before falling in the diabetic groups and hypertriglyceridaemic non-diabetic subjects when compared with the normotriglyceridaemic control subjects whose levels decreased after 2 h (P<0.05). A significantly different triglyceride-rich lipoprotein apolipoprotein E profile was also exhibited by the diabetic patients (P<0.05). Levels of triglyceride-rich lipoprotein, cholesterol, triglyceride, total protein and apoprotein B were elevated in the hypertriglyceridaemic subjects, both diabetic and non-diabetic. These results indicate that hypertriglyceridaemia is associated with altered metabolism and composition of post-prandial triglyceride-rich lipoprotein particles in both poorly controlled diabetic and non-diabetic subjects.

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Authors and Affiliations

  1. Department of Clinical Medicine, Trinity College, Dublin, Ireland

    A. Curtin, D. Owens & G. H. Tomkin

  2. Department of Biochemistry, Royal College of Surgeons in Ireland, Dublin, Ireland

    A. Curtin, P. Collins & A. Johnson

  3. The Adelaide Hospital, Dublin, Ireland

    P. Deegan & G. H. Tomkin

Authors
  1. A. Curtin
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  2. P. Deegan
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  3. D. Owens
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  4. P. Collins
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  5. A. Johnson
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  6. G. H. Tomkin
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Curtin, A., Deegan, P., Owens, D. et al. Intestinally derived lipoprotein particles in non-insulin-dependent diabetic patients with and without hypertriglyceridaemia. Acta Diabetol 32, 244–250 (1995). https://doi.org/10.1007/BF00576257

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  • DOI: https://doi.org/10.1007/BF00576257

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